CN116326102A

CN116326102A - Method, apparatus and storage medium for transmitting positioning reference signal

Info

Publication number: CN116326102A
Application number: CN202380007957.6A
Authority: CN
Inventors: 江小威
Original assignee: Beijing Xiaomi Mobile Software Co Ltd
Current assignee: Beijing Xiaomi Mobile Software Co Ltd
Priority date: 2023-02-03
Filing date: 2023-02-03
Publication date: 2023-06-23
Also published as: WO2024159545A1

Abstract

The present disclosure relates to a method, apparatus, and storage medium for transmitting a positioning reference signal. The method comprises the following steps: the first terminal equipment determines power configuration information corresponding to a direct link positioning reference signal SL PRS, and determines first transmission power corresponding to the SL PRS according to the power configuration information. In this way, the first transmit power of the SL PRS may be flexibly controlled according to the power configuration information.

Description

Method, apparatus and storage medium for transmitting positioning reference signal

Technical Field

The present disclosure relates to the field of communications technologies, and in particular, to a method, an apparatus, and a storage medium for transmitting a positioning reference signal.

Background

With the development of wireless communication technology, in order to achieve direct communication between terminal devices, the third generation partnership project (3rd Generation Partnership Project,3GPP) defines a communication manner of a direct link (Sidelink, which may also be referred to as a side link). For example, one typical application scenario of a direct link is the Vehicle-to-evaluation (V2X). In the Internet of vehicles, each vehicle can be used as a terminal, and information transmission can be carried out between the terminals through a direct link, so that communication time delay can be effectively reduced.

In a direct link communication scenario, in order to perform positioning or ranging of a terminal device, the terminal device is required to transmit and/or receive a direct link positioning reference signal (Sidelink Positioning Reference Signal, SL PRS).

Disclosure of Invention

The present disclosure provides a method, apparatus, and storage medium for transmitting a positioning reference signal.

According to a first aspect of embodiments of the present disclosure, there is provided a method for transmitting a positioning reference signal, performed by a first terminal device, the method comprising:

determining a first transmission power corresponding to a direct link positioning reference signal SL PRS according to power configuration information corresponding to the SL PRS;

and sending the SL PRS to a second terminal device according to the first sending power.

In some embodiments, the power configuration information includes a second transmit power; the determining, according to the power configuration information corresponding to the direct link positioning reference signal SL PRS, the first transmission power corresponding to the SL PRS includes:

if the first terminal equipment meets a first condition, the second sending power is used as the first sending power; wherein the first condition includes at least one of:

the transmission mode of the SL PRS is a broadcast or multicast mode;

The first terminal device comprises a power configuration message;

the first terminal equipment adopts a second resource allocation mode to allocate the resource of the SL PRS;

and the first terminal equipment does not acquire the path loss of the direct link of the second terminal equipment.

In some embodiments, the second transmit power is an average resource power corresponding to a radio resource used to transmit the SL PRS.

In some embodiments, the radio resource comprises resource elements, REs, the average resource power being per RE energy, EPREs.

In some embodiments, the power configuration information includes at least one of a path loss compensation factor, a target received power, and a path loss reference signal; the determining, according to the power configuration information corresponding to the direct link positioning reference signal SL PRS, the first transmission power corresponding to the SL PRS includes:

if the first terminal equipment meets a second condition, determining the first sending power according to the power configuration information; wherein the second condition includes at least one of:

the transmission mode of the SL PRS is a unicast mode or a multicast mode;

the first terminal device includes a plurality of power configuration information;

the first terminal device comprises a power configuration message;

And the first terminal equipment acquires the path loss of the direct link of the second terminal equipment.

In some embodiments, the determining the first transmit power according to the power configuration information comprises:

obtaining path loss according to the path loss reference signal measurement;

and calculating the first transmitting power according to the path loss compensation factor, the target receiving power and the path loss.

In some embodiments, the path loss reference signal includes at least one of:

a direct link synchronization signal SL SSB;

direct link channel state information SL CSI-RS;

a direct link positioning reference signal SL PRS;

physical direct link shared channel SL PSSCH;

physical direct link control channel SL PSCCH.

In some embodiments, the power configuration information is determined by:

determining the power configuration information according to pre-configured direct link pre-configuration information; or,

and receiving the direct link configuration information sent by the network equipment, and determining the power configuration information according to the direct link configuration information.

In some embodiments, the receiving the direct link configuration information sent by the network device includes:

Receiving a broadcast message sent by network equipment; the broadcast message includes the direct link configuration information; or,

receiving a first message sent by a network device to the first terminal device; the first message includes the direct link configuration information.

In some embodiments, the power configuration information is determined by:

determining a resource allocation mode corresponding to the SL PRS;

and determining the power configuration information corresponding to the SL PRS according to the resource allocation mode.

In some embodiments, the resource allocation pattern is a first resource allocation pattern or a second resource allocation pattern; the first resource allocation mode is a resource allocation mode for selecting resources based on network equipment, and the second resource allocation mode is a resource allocation mode for selecting resources based on terminal equipment.

In some embodiments, the determining the power configuration information corresponding to the SL PRS according to the resource allocation pattern includes:

if the resource allocation mode is the second resource allocation mode, if the direct link configuration information sent by the network equipment is received, determining the power configuration information according to the direct link configuration information; or,

And if the resource allocation mode is the second resource allocation mode, if the direct link configuration information sent by the network equipment is not received, determining the power configuration information according to the pre-configured direct link pre-configuration information.

In some embodiments, in a case that the resource allocation mode is a first resource allocation mode, the wireless resource for transmitting the SL PRS is allocated by the network device in a manner of dynamic scheduling or configuring an authorized CG; the determining the power configuration information corresponding to the SL PRS according to the resource allocation pattern includes:

receiving a radio link control (RRC) message or a Media Access Control (MAC) CE sent by a network device, and acquiring power configuration information corresponding to the first terminal device according to the RRC message or the MAC CE; or,

receiving a scheduling instruction corresponding to each dynamic scheduling under the condition that the wireless resources are allocated by the network equipment in a dynamic scheduling mode, and acquiring the power configuration information from the scheduling instruction; or,

and under the condition that the wireless resources are distributed by the network equipment in a mode of configuring the authorized CG, receiving configuration instructions corresponding to each configuring the authorized CG, and acquiring the power configuration information from the configuration instructions.

In some embodiments, the obtaining the power configuration information from the configuration indication includes:

acquiring the power configuration information corresponding to the first terminal equipment from the configuration instruction; or,

acquiring the power configuration information corresponding to the configuration authorization CG from the configuration indication; or,

acquiring the power configuration information corresponding to at least one SL PRS resource of the configuration authorization CG from the configuration indication; or,

and acquiring the power configuration information corresponding to at least one SL PRS resource group of the configuration authorization CG from the configuration indication.

In some embodiments, the method further comprises:

and sending the power configuration information to the second terminal equipment.

According to a second aspect of embodiments of the present disclosure, there is provided a method of transmitting a positioning reference signal, performed by a network device, the method comprising:

transmitting direct link configuration information to a first terminal device; the direct link configuration information is used for indicating the first terminal equipment to determine power configuration information corresponding to a direct link positioning reference signal SL PRS.

In some embodiments, the sending the direct link configuration information to the first terminal device includes:

Transmitting the direct link configuration information to the first terminal equipment through a broadcast message; or,

and sending the direct link configuration information to the first terminal equipment through a first message, wherein the first message is a special message corresponding to the first terminal equipment.

In some embodiments, the power configuration information includes at least a second transmit power corresponding to the SL PRS.

In some embodiments, the power configuration information includes at least one of:

a path loss compensation factor;

target received power;

and (5) path loss reference signals.

In some embodiments, the path loss reference signal includes at least one of:

a direct link synchronization signal SL SSB;

direct link channel state information SL CSI-RS;

a direct link positioning reference signal SL PRS;

physical direct link shared channel SL PSSCH;

physical direct link control channel SL PSCCH.

According to a third aspect of embodiments of the present disclosure, there is provided an apparatus for transmitting a positioning reference signal, applied to a first terminal device, the apparatus comprising:

the first processing module is configured to determine a first transmission power corresponding to a direct link positioning reference signal SL PRS according to power configuration information corresponding to the SL PRS;

And the first transmitting module is configured to transmit the SL PRS to the second terminal equipment according to the first transmitting power.

According to a fourth aspect of embodiments of the present disclosure, there is provided an apparatus for transmitting a positioning reference signal, applied to a network device, the apparatus comprising:

the second sending module is configured to send the direct link configuration information to the first terminal equipment; the direct link configuration information is used for indicating the first terminal equipment to determine power configuration information corresponding to a direct link positioning reference signal SL PRS.

According to a fifth aspect of embodiments of the present disclosure, there is provided an apparatus for transmitting a positioning reference signal, including:

a processor;

a memory for storing processor-executable instructions;

wherein the processor is configured to perform the steps of the method of transmitting positioning reference signals provided by the first aspect of the present disclosure.

According to a sixth aspect of embodiments of the present disclosure, there is provided an apparatus for transmitting a positioning reference signal, including:

a processor;

a memory for storing processor-executable instructions;

wherein the processor is configured to perform the steps of the method of transmitting positioning reference signals provided by the second aspect of the present disclosure.

According to a seventh aspect of embodiments of the present disclosure, there is provided a computer readable storage medium having stored thereon computer program instructions which, when executed by a processor, implement the steps of the method of transmitting a positioning reference signal provided by the first aspect of the present disclosure.

According to an eighth aspect of embodiments of the present disclosure, there is provided a computer readable storage medium having stored thereon computer program instructions which, when executed by a processor, implement the steps of the method of transmitting a positioning reference signal provided by the second aspect of the present disclosure.

According to a ninth aspect of embodiments of the present disclosure, there is provided a communication system comprising:

a first terminal device, where the first terminal device may perform the method for sending a positioning reference signal provided in the first aspect of the present disclosure;

a network device, which may perform the method for transmitting a positioning reference signal provided in the second aspect of the present disclosure.

The technical scheme provided by the embodiment of the disclosure can comprise the following beneficial effects: the first terminal equipment determines power configuration information corresponding to a direct link positioning reference signal SL PRS, and determines first transmission power corresponding to the SL PRS according to the power configuration information. In this way, the transmission power of the SL PRS may be flexibly controlled according to the power configuration information.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the disclosure and together with the description, serve to explain the principles of the disclosure.

Fig. 1 is a schematic diagram of a communication system, shown according to an exemplary embodiment.

Fig. 2 is a flow chart illustrating a method of transmitting positioning reference signals according to an exemplary embodiment.

Fig. 3 is a flow chart illustrating a method of transmitting positioning reference signals according to an exemplary embodiment.

Fig. 4 is a flowchart illustrating a method of transmitting a positioning reference signal according to an exemplary embodiment.

Fig. 5 is a flowchart illustrating a method of transmitting a positioning reference signal according to an exemplary embodiment.

Fig. 6 is a flowchart illustrating a method of transmitting a positioning reference signal according to an exemplary embodiment.

Fig. 7 is a flowchart illustrating a method of transmitting a positioning reference signal according to an exemplary embodiment.

Fig. 8 is a block diagram illustrating an apparatus for transmitting a positioning reference signal according to an exemplary embodiment.

Fig. 9 is a block diagram illustrating an apparatus for transmitting a positioning reference signal according to an exemplary embodiment.

Fig. 10 is a block diagram illustrating an apparatus for transmitting a positioning reference signal according to an exemplary embodiment.

Detailed Description

Reference will now be made in detail to exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numbers in different drawings refer to the same or similar elements, unless otherwise indicated. The implementations described in the following exemplary examples are not representative of all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with some aspects of the present disclosure as detailed in the accompanying claims.

It should be noted that, all actions for acquiring signals, information or data in the present disclosure are performed under the condition of conforming to the corresponding data protection rule policy of the country of the location and obtaining the authorization given by the owner of the corresponding device.

In the description of the present disclosure, terms such as "first," "second," and the like are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. In addition, unless otherwise stated, in the description with reference to the drawings, the same reference numerals in different drawings denote the same elements.

In the description of the present disclosure, unless otherwise indicated, "a plurality" means two or more, and other adjectives are similar thereto. "at least one item", "an item" or "a plurality of items" or the like, refer to any combination of these items, including any combination of single item(s) or plural items(s). For example, at least one term(s) may represent any number; as another example, one (or more) of a, b, and c may represent: a, b, c, a-b, a-c, b-c, or a-b-c, wherein a, b, c may be single or plural. "and/or" is an association relationship describing an association object, meaning that there may be three relationships, e.g., a and/or B, which may represent: there are three cases, a alone, a and B together, and B alone, wherein a, B may be singular or plural. The character "/" indicates that the front-rear association object is an or relationship. The singular forms "a", "an", "the" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

Although the operations or steps are described in a particular order in the disclosed embodiments or figures, this should not be understood as requiring that the operations or steps be performed in the particular order shown or in sequential order, or that all of the illustrated operations or steps be performed, to achieve desirable results. In embodiments of the present disclosure, these operations or steps may be performed in any order, without conflict; these operations or steps may also be performed in parallel; some of these operations or steps may also be performed; operations or steps in various embodiments or figures may be combined arbitrarily, as this disclosure is not limited thereto.

The following first describes the environment in which embodiments of the present disclosure are implemented.

The technical scheme of the embodiment of the disclosure can be applied to various communication systems. The communication system may include one or more of the fourth generation (the 4th Generation,4G), the fifth generation (the 5th Generation,5G) communication systems, and other future wireless communication systems, such as 6G. The communication system may also include one or more of a public land mobile network (Public Land Mobile Network, PLMN) network, a Device-to-Device (D2D) communication system, a machine-to-machine (Machine to Machine, M2M) communication system, an internet of things (Internet of Things, ioT) communication system, a Vehicle-to-evaluation (V2X) communication system, or other communication systems.

Fig. 1 is a schematic diagram of a communication system 100, shown according to an example embodiment. As shown in fig. 1, the communication system 100 may include a terminal device 150 and a network device 160. The communication system may be used to support 4G network access technologies, such as long term evolution (Long Term Evolution, LTE) access technologies, or 5G network access technologies, such as New radio access technologies (New Radio Access Technology, new RAT), or other future wireless communication technologies. It should be noted that, in the communication system, the number of network devices and terminal devices may be one or more, and the number of network devices and terminal devices in the communication system shown in fig. 1 is merely an adaptive example, which is not limited in this disclosure.

The network device in fig. 1 may be used to support terminal access, e.g., the network device may be an evolved base station (evolutional Node B, eNB or eNodeB) in LTE; the network device may also be a next generation base station (the next Generation Node B, gNB or gndeb) in a 5G network; the network device may also be a radio access network (NG-Radio Access Network, NG-RAN) device in a 5G network; the network device may also be a base station in a future evolved public land mobile network (Public Land Mobile Network, PLMN), a broadband network service gateway (Broadband Network Gateway, BNG), an aggregation switch, or a non-3 GPP access device, etc. Alternatively, the network device in the embodiments of the present disclosure may include various forms of base stations, such as: macro base stations, micro base stations (also referred to as small stations), relay stations, access points, 5G base stations or future base stations, satellites, transmission points (Transmitting and Receiving Point, TRP), transmission points (Transmitting Point, TP), mobile switching centers, and Device-to-Device (D2D), machine-to-Machine (M2M), internet of things (Internet of Things, ioT), internet of vehicles (V2X), other devices that assume base station functionality in a communication system, and the like, as the embodiments of the present disclosure are not limited in this regard. For convenience of description, in all embodiments of the present disclosure, an apparatus for providing a wireless communication function for a terminal device is collectively referred to as a network device or a base station.

The Terminal device in fig. 1 may be an electronic device providing voice or data connectivity, and may be referred to as a User Equipment (UE), a Subscriber Unit (Subscriber Unit), a Mobile Station (Mobile Station), a Station (Station), a Terminal (Terminal), or the like, for example. By way of example, the terminal device may include a smart phone, a smart wearable device, a smart speaker, a smart tablet, a wireless modem (modem), a wireless local loop (Wireless Local Loop, WLL) station, a personal digital assistant (Personal Digital Assistant, PDA), a customer terminal device (Customer Premise Equipment, CPE), and the like. With the development of wireless communication technology, a device that can access a communication system, can communicate with a network device of the communication system, can communicate with other objects through the communication system, or a device that can directly communicate between two or more devices may be a terminal device in an embodiment of the disclosure; for example, terminals and automobiles in intelligent transportation, household devices in intelligent homes, meter reading instruments for electric power in smart grids, voltage monitoring instruments, environment monitoring instruments, video monitoring instruments in intelligent security networks, cash registers, etc. In the embodiments of the present disclosure, the terminal device may communicate with the network device. Communication may also take place between a plurality of terminal devices. The terminal device may be stationary or mobile, and this disclosure is not limited in this regard.

In some embodiments, the terminal device in fig. 1 may include a first terminal device 151 and a second terminal device 152, where the first terminal device 151 and the second terminal device 152 may communicate via a direct link. The manner in which the first terminal device 151 and the second terminal device 152 perform the sip communication may include any one or more of unicast, multicast, and broadcast. It should be noted that, in fig. 1, the terminal device 150 may further include a third terminal device, a fourth terminal device, or more terminal devices; the number of the first terminal devices 151 may be one or more, and the number of the second terminal devices 152 may be one or more, which is not limited in this disclosure.

In some embodiments, the first terminal device may communicate with the network device over a non-direct link, which may include an uplink and/or a downlink between the first terminal device and the network device. For example, the non-direct link may include one or more of PRACH (Physical Random Access Channel ), PUCCH (Physical Uplink Control Channel, physical uplink control channel), PUSCH (Physical Uplink Shared Channel ), PDSCH (Physical Downlink Shared Channel, physical downlink shared channel), PDCCH (Physical Downlink Control Channel ), and the like. Likewise, the second terminal device may also communicate with the network device via a non-direct link.

Fig. 2 is a flow chart illustrating a method of transmitting positioning reference signals according to an exemplary embodiment. The method may be applied to a first terminal device in the above-described communication system. As shown in fig. 2, the method may include:

s201, the first terminal equipment determines a first transmitting power corresponding to a direct link positioning reference signal SL PRS according to power configuration information corresponding to the SL PRS.

S202, the first terminal equipment transmits SL PRS to the second terminal equipment according to the first transmission power.

Wherein the second terminal device is a terminal device receiving SL PRS, and the second terminal device may be one or more.

In some embodiments, the first terminal device may send the SL PRS to the at least one second terminal device over a direct link Sidelink.

In other embodiments, the first terminal device may broadcast a SL PRS and the at least one second terminal device may receive the SL PRS broadcast by the first terminal device.

In some embodiments, the power configuration information may include the second transmission power, which may be taken as the first transmission power.

The second transmission power may be a resource power corresponding to a radio resource used for transmitting the SL PRS. For example, the first transmission power may be an average resource power, a maximum resource power, or a minimum resource power corresponding to a radio resource used for transmitting the SL PRS.

In one implementation, the radio Resource that transmits the SL PRS may include at least one Resource Element (RE), and the average Resource power may be energy per RE (Energy Per Resource Element, EPRE) that may be used to characterize an average power of at least one RE. Likewise, the maximum resource power may represent a maximum power of the at least one RE, and the minimum resource power may represent a minimum power of the at least one RE.

In another implementation, the radio Resource that transmits the SL PRS may include at least one Resource Block (RB), and the average Resource power may be an average power per RB. Likewise, the maximum resource power may represent a maximum power of at least one RB, and the minimum resource power may represent a minimum power of at least one RB.

In one implementation, the second transmit power may be a power value, and the unit of the second transmit power may be decibel milliwatts dBm or milliwatts mw.

In other embodiments, the power configuration information may include at least one of:

road loss compensation factor (alpha): the path loss compensation factor may be any value between 0 and 1, and the path loss compensation may be obtained by multiplying the path loss compensation factor by the path loss compensation factor, for example, a path loss compensation factor of 1 may indicate that all path losses are compensated, and a path loss compensation factor of 0 may indicate that no path loss is compensated at all.

Target received power (P0): the target receiving power is used for indicating the power expected to be received by the receiving end;

path loss reference signal: the path loss reference signal is a signal for measuring path loss.

In some embodiments, the first terminal device may measure a path loss according to the path loss reference signal, and calculate the first transmission power according to the path loss compensation factor, the target received power, and the path loss.

For example, the first terminal device may calculate the first transmission power corresponding to the SL PRS according to the following formula (1):

Power＝P0+alpha×PL(1)

wherein Power represents a first transmission Power corresponding to SL PRS, P0 represents a target reception Power, alpha represents a path loss compensation factor, and PL represents a path loss measured according to a path loss reference signal.

For another example, the first terminal device may calculate the first transmission power corresponding to the SL PRS according to the following formula (2):

Power ＝ P0 + alpha×PL + other (2)

wherein Power represents a first transmission Power corresponding to SL PRS, P0 represents a target reception Power, alpha represents a path loss compensation factor, PL represents a path loss measured according to a path loss reference signal, and other represents other Power compensation parameters, which may be preset compensation values, for example.

In some embodiments, the path loss reference signal may include at least one of:

a direct link synchronization signal (Sidelink Synchronization Signal Block, SL SSB);

direct link channel state information (Sidelink Channel State Information-Reference Signal, SL CSI-RS);

a direct link positioning reference signal (Sidelink Positioning Reference Signal, SL PRS);

physical direct link shared channel (Physical Sidelink Control Channel, PSSCH): for example, DMRS of PSSCH;

physical direct link control channel (Physical Sidelink Shared Channel, PSCCH): for example, the DMRS of the PSCCH.

In some embodiments, the path loss reference signal may be a signal transmitted by a second terminal device to a first terminal device, where the first terminal device is a terminal device transmitting the SL PRS, and the second terminal device is a terminal device receiving the SL PRS.

In this way, the first terminal device may calculate the path loss according to the measurement result of the path loss reference signal.

In other embodiments, the path loss reference signal may be a signal sent by a first terminal device to a second terminal device, where, similarly, the first terminal device is a terminal device that sends a SL PRS, and the second terminal device is a terminal device that receives the SL PRS.

In one implementation, the second terminal device may calculate a path loss according to the path loss reference signal, and the second terminal device may send a first measurement report to the first terminal device, where the first measurement report may include the calculated path loss.

In one implementation, the second terminal device may obtain a measurement result of the path loss reference signal according to the measurement, and the second terminal device may send a second measurement report to the first terminal device, where the second measurement report may include the measurement result. The first terminal device may calculate the path loss according to the measurement result.

By adopting the method, the first terminal equipment determines the power configuration information corresponding to the direct link positioning reference signal SL PRS, and determines the first transmission power corresponding to the SL PRS according to the power configuration information. In this way, the transmission power of the SL PRS may be flexibly controlled according to the power configuration information.

In some embodiments of the present disclosure, in a case where the above power configuration information includes the second transmission power, if the first terminal device satisfies the first condition, the second transmission power may be regarded as the first transmission power. Wherein the first condition may include at least one of the following conditions:

The transmission mode of the SL PRS is a broadcast or multicast mode, that is, the first terminal device transmits the SL PRS in a broadcast or multicast mode.

The second condition, the first terminal device, includes a power configuration information, and the power configuration information includes a second transmission power. For example, the first terminal device acquires only the resource power corresponding to the radio resource used for transmitting the SL PRS, but does not acquire the path loss compensation factor, the target received power, and the path loss reference signal. The power configuration information may be unique power configuration information of the first terminal device.

And thirdly, the first terminal equipment adopts a second resource allocation mode to allocate the resource of the SL PRS. The second resource allocation mode may be a resource allocation mode for selecting resources based on the first terminal device, and the second resource allocation mode may also be referred to as an autonomous resource allocation mode.

And the first terminal equipment does not acquire the path loss of the direct link of the second terminal equipment. The second terminal device may be a terminal device that receives SL PRS, and the second terminal device may be one or more terminal devices.

For example, if the first terminal device does not receive the path loss reference signal sent by the second terminal device, it may be determined that the first terminal device does not acquire the path loss of the direct link of the second terminal device. The path loss reference signal may include SLSSB, SL CSI-RS, SL PRS, PSCCH, or PSSCH.

And fifthly, the first terminal equipment and the second terminal equipment do not establish a direct link. Likewise, the second terminal device may be a terminal device receiving SL PRS.

And under the condition six, the second terminal equipment does not configure the measurement report sent to the first terminal equipment. The second terminal device may be a terminal device receiving the SL PRS and the measurement report may be a CSI-RS report.

And the first terminal equipment does not receive the measurement report sent by the second terminal equipment. Likewise, the second terminal device is a terminal device receiving SL PRS. The measurement report may be a CSI-RS report.

In this way, the first terminal device can take the second transmission power as the first transmission power in the case where the above-described first condition is satisfied.

In some embodiments of the present disclosure, the power configuration information may include at least one of a path loss compensation factor, a target received power, and a path loss reference signal, and if the first terminal device satisfies a second condition, the first transmission power may be determined according to the power configuration information; wherein the second condition comprises at least one of the following conditions:

and under the condition eight, the transmission mode of the SL PRS is a unicast mode or a multicast mode, namely the first terminal equipment adopts a single-thin or multicast mode to transmit the SL PRS.

Condition nine, the first terminal device includes a plurality of power configuration information. For example, the first terminal device obtains the second transmission power used for transmitting the SL PRS and the power parameter information such as the path loss compensation factor, the target received power, and the path loss reference signal, and then the first terminal device may preferentially use the power parameter information such as the path loss compensation factor, the target received power, and the path loss reference signal.

The tenth condition, the first terminal device includes a power configuration information, and the power configuration information includes at least one of the above-mentioned path loss compensation factor, the target received power, and the path loss reference signal. For example, the first terminal device acquires the path loss compensation factor, the target received power, and the path loss reference signal, but does not acquire the second transmission power for transmitting the SL PRS. The power configuration information may be unique power configuration information of the first terminal device.

And the first terminal equipment acquires the path loss of the direct link of the second terminal equipment, wherein the second terminal equipment is the terminal equipment for receiving the SL PRS.

For example, the first terminal device may receive the path loss reference signal sent by the second terminal device, and detect, according to the path loss reference signal, the path loss of the direct link. The path loss reference signal may include SLSSB, SL CSI-RS, SL PRS, PSCCH, or PSSCH.

Condition twelve, the first terminal device establishes a direct link with the second terminal device. Likewise, the second terminal device may be a terminal device receiving SL PRS.

The thirteenth condition, the second terminal device configures a measurement report sent to the first terminal device. The second terminal device may be a terminal device receiving the SL PRS and the measurement report may be a CSI-RS report.

Condition fourteen, the first terminal device receives the measurement report sent by the second terminal device. Likewise, the second terminal device is a terminal device receiving SL PRS. The measurement report may be a CSI-RS report.

In this way, the first terminal device may determine the first transmission power corresponding to the SL PRS according to at least one of the path loss compensation factor, the target reception power, and the path loss reference signal if the above second condition is satisfied.

In embodiments of the present disclosure, the power configuration information corresponding to the SL PRS may be determined by any one of the following manners, by way of example:

in some embodiments, the first terminal device may determine the power configuration information according to pre-configured direct link pre-configuration information.

For example, the power configuration information may be included in the direct link pre-configuration information.

In other embodiments, the first terminal device may receive direct link configuration information sent by the network device; and determining power configuration information according to the direct link configuration information.

For example, the power configuration information may be included in the direct link configuration information.

For example, the first terminal device may receive a broadcast message sent by the network device; the broadcast message may include direct link configuration information.

For another example, the first terminal device may receive a first message sent by the network device to the first terminal device; the first message may include direct link configuration information.

The first message may be a dedicated message corresponding to the first terminal device. The first message may include at least one of a radio resource control RRC (Radio Resource Control) message, a medium access control element MAC CE (Medium Access Control Control Element), downlink control information DCI (Downlink Control Information), or other message sent by the network device to the first terminal device, for example.

In other embodiments, the power configuration information may be protocol agreed information.

In this way, the first terminal device may determine the power configuration information corresponding to the direct link positioning reference signal SL PRS by using any one of the above manners, and determine the first transmission power corresponding to the SL PRS according to the power configuration information. Therefore, the transmission power of the SL PRS can be flexibly controlled according to the power configuration information, the transmission power of the SL PRS can be prevented from being too large or too small, and the reliability of the transmission of the SL PRS is improved.

Fig. 3 is a flow chart illustrating a method of transmitting positioning reference signals according to an exemplary embodiment. As shown in fig. 3, the method may include:

s301, the first terminal equipment determines a resource allocation mode corresponding to the SL PRS.

In some embodiments, the resource allocation pattern may be a first resource allocation pattern (mode 1) or a second resource allocation pattern (mode 2). The first resource allocation mode may be a resource allocation mode for performing resource selection based on the network device, and the second resource allocation mode may be a resource allocation mode for performing resource selection based on the terminal device, and may also be referred to as an autonomous resource allocation mode.

For example, if the resource allocation mode corresponding to the SL PRS is the first resource allocation mode, the radio resource for the SL PRS is allocated by the network device; if the resource allocation mode corresponding to the SL PRS is the second resource allocation mode, the wireless resource for the SL PRS is allocated autonomously by the first terminal equipment.

In some embodiments, the resource allocation pattern may be a pattern determined by the first terminal device according to the received resource pattern configuration information. The resource mode configuration information may be information that the network device transmits to the first terminal device.

In one implementation, the resource pattern configuration information may be used to individually indicate the resource allocation pattern of the SL PRS.

In another implementation, the resource pattern configuration information may be used to indicate a resource allocation pattern of the direct link, and the SL PRS may multiplex the resource allocation pattern of the direct link.

In some embodiments, in a case where a resource allocation mode corresponding to the SL PRS is a first resource allocation mode, a radio resource for transmitting the SL PRS may be allocated by a network device in a resource allocation manner of dynamic scheduling or Configuration Grant (CG).

S302, the first terminal equipment determines power configuration information corresponding to the SL PRS according to the resource allocation mode.

In some embodiments of the present disclosure, in a case where the resource allocation mode is the first resource allocation mode, the radio resource for transmitting the SL PRS is allocated by the network device in a manner of dynamic scheduling or Configuration Grant (CG).

In some embodiments, the first terminal device may receive a radio link control RRC message or a medium access control unit MAC CE sent by the network device, and obtain power configuration information corresponding to the first terminal device according to the RRC message or the MAC CE. The power configuration information may be per terminal equipment (per UE) configuration.

In other embodiments, in the case where the radio resources of the SL PRS are allocated by the network device in a dynamic scheduling manner, the first terminal device may receive a scheduling indication corresponding to each dynamic scheduling, and obtain power configuration information from the scheduling indication. Wherein the scheduling indication may be PDCCH DCI.

In some other embodiments, in the case that the radio resource is allocated by the network device in a manner of configuring the grant CG, the first terminal device may receive a configuration indication corresponding to each configuring grant CG, and obtain power configuration information from the configuration indication.

The configuration indication may be a configuration DCI for configuring the configuration grant CG, an activation DCI (activation DCI) for activating the configuration grant CG, or an RRC message or MAC CE for configuring the configuration grant CG.

In one implementation manner, the first terminal device may obtain power configuration information corresponding to the first terminal device from the configuration indication; the power configuration information is configured for each terminal equipment (per UE).

In another implementation manner, the first terminal device may acquire power configuration information corresponding to the configuration authorization CG from the configuration indication; the power configuration information is configured for every CG (per Configured Grant).

In another implementation manner, the first terminal device may obtain, from the configuration indication, power configuration information corresponding to at least one SL PRS resource configuring the authorized CG; the power configuration information is configured for PRS resources per SL per CG (per Configured Grant per SL-PRS resources). The SL PRS resources may be a subset of radio resources used to transmit SL PRSs, which may include, for example, a plurality of SL PRS resources.

In yet another implementation manner, the first terminal device may obtain, from the configuration indication, power configuration information corresponding to at least one SL PRS resource group configuring the authorized CG; the power configuration information is configured for per CG per SL PRS resources (per Configured Grant per SL-PRS resource set). Likewise, the SL PRS resource lease may be a subset of radio resources used to transmit SL PRS, which may include, for example, multiple groups of SL PRS resources.

In some embodiments, if the radio resource is allocated by the network device in a manner of configuring the grant CG, the power configuration information may be one or more. For example, each CG may correspond to independent power configuration information, or each SL PRS resource of each CG corresponds to independent power configuration information, or each SL PRS resource group of each CG corresponds to independent power configuration information, or the CGs of all SL PRSs correspond to the same power configuration information, or each terminal device corresponds to independent power configuration information.

In some embodiments, the first terminal device may further receive a second message sent by the network device, where the second message may include CG configuration information, and the power configuration information may be determined according to the CG configuration information.

Wherein the second message may comprise at least one of an RRC message, a MAC CE, a DCI, or other message sent by the network device to the first terminal device.

In one implementation, the second message may be an RRC dedicated message corresponding to the first terminal device.

In one implementation, if each SL PRS resource of each CG corresponds to a respective independent power configuration information, one or more SL PRS resources may be included in the second message.

In another implementation, if each SL PRS resource group of each CG corresponds to a respective independent power configuration information, one or more SL PRS resource groups may be included in the second message.

In one implementation, the power configuration information may be Configured per CG, for example, the power configuration information may be included in each Configured Grant activation DCI (activation DCI), so that the first terminal device may obtain the power configuration information in each Configured Grant corresponding activation DCI (activation DCI).

In other embodiments, if the radio resource is allocated by the network device in a dynamically scheduled resource allocation manner, the power configuration information may be configured separately for different terminal devices.

In one implementation, the power configuration information may be configured separately for each dynamic scheduling, for example, the power configuration information may be included in PDCCH DCI for each dynamic scheduling, so that the first terminal device may obtain the power configuration information in PDCCH DCI corresponding to each dynamic scheduling.

In one implementation, the power configuration information may be configured separately for each terminal device, for example, the first terminal device may be notified through an RRC message or MAC CE; the power configuration information may be applicable to dynamically scheduled SL-PRSs, as well as Configured Grant scheduled SL-PRSs.

In this way, in the case where the resource allocation mode is the first resource allocation mode, the first terminal device may acquire the power configuration information in any one or more of the foregoing manners.

In other embodiments of the present disclosure, in the case where the resource allocation mode is the second resource allocation mode, the power configuration information may be from a SL configuration parameter sent by the network device, or a SL configuration parameter preconfigured by the first terminal device, or a system contract or a protocol contract.

In some embodiments, if the resource allocation mode is the second resource allocation mode, if the direct link configuration information sent by the network device is received (for example, the first terminal device is in a state with network coverage, that is, the UE in coverage), the power configuration information is determined according to the direct link configuration information.

In other embodiments, in the case where the resource allocation mode is the second resource allocation mode, if the direct link configuration information sent by the network device is not received (for example, the first terminal device is in a state without network coverage, that is, UE outof coverage), the power configuration information is determined according to the preconfigured direct link preconfiguration information.

In this way, in the case where the resource allocation mode is the second resource allocation mode, the first terminal device may acquire the power configuration information in any one or more of the above manners.

S303, the first terminal equipment determines a first transmitting power corresponding to the SL PRS according to the power configuration information.

It should be noted that, the specific implementation manner of the step S303 may refer to the description of the step S202 in the foregoing embodiment of the disclosure, which is not repeated herein.

In this way, the first terminal device may determine the power configuration information corresponding to the SL PRS according to the resource allocation pattern, and determine the first transmission power corresponding to the SL PRS according to the power configuration information.

Fig. 4 is a flowchart illustrating a method of transmitting a positioning reference signal according to an exemplary embodiment. As shown in fig. 4, the method may include:

s401, the first terminal equipment sends power configuration information to the second terminal equipment.

The first terminal equipment is a terminal equipment for transmitting the SL PRS, and the second terminal equipment is a terminal equipment for receiving the SL PRS.

In some embodiments, the power configuration information may be power configuration information corresponding to SL PRS determined by the first terminal device.

In some embodiments, the power configuration information may include a first transmit power corresponding to transmitting the SL PRS.

In other embodiments, the power configuration information may include at least one of a path loss compensation factor, a target received power, and a path loss reference signal.

In some embodiments, the first terminal device may send a third message to the second terminal device, where the third message may include the power configuration information.

In one implementation, the third message may include at least one of a direct link radio resource control, sip, RRC (Sidelink Radio Resource Control) message, a direct link media access control, MAC, CE (Sidelink Medium Access Control Control Element), direct link downlink control information, DCI (Sidelink Downlink Control Information), or other messages corresponding to the direct link.

In another implementation, the third message may be a direct link system broadcast message, a direct link RRC reconfiguration message, a direct link LTE positioning protocol (Sidelink LTE Positioning Protocol, SLPP) message, or a direct link RRC message specific to the first terminal device.

In some embodiments, the power configuration information may be used to instruct the second terminal device to determine the path loss based on the power configuration information.

For example, the second terminal device may determine the first transmission power of the SL PRS based on the power configuration information, and may calculate the path loss according to the first transmission power and the received power of the SL PRS received by the second terminal device. For example, the difference between the first transmit power and the receive power may be taken as the path loss.

In other embodiments, the power configuration information may be used to instruct the second terminal device to receive the SL PRS according to the power configuration information.

For example, the second terminal device may determine a reception power at which the SL PRS is received according to the power configuration information and receive the SL PRS according to the reception power. For example, the second terminal device may demodulate the received wireless signal to obtain the SL PRS when the power of the received wireless signal is greater than or equal to the received power; for another example, the second terminal device may not demodulate the wireless signal if the power of the received wireless signal is less than the received power, and determine that the SL PRS is not received.

It should be noted that, without contradiction, the present embodiment may be combined with the foregoing embodiment or implementation of the present disclosure and various alternatives thereof.

In this way, the first terminal device sends the power configuration information to the second terminal device to instruct the second terminal device to receive the SL PRS according to the power configuration information, so that the reliability of SL PRS transmission may be improved.

Fig. 5 is a flowchart illustrating a method of transmitting a positioning reference signal according to an exemplary embodiment. The method may be applied to a second terminal device in the above-described communication system. As shown in fig. 5, the method may include:

s501, the second terminal equipment receives a direct link positioning reference signal SL PRS sent by the first terminal equipment.

The SL PRS is a signal sent by the first terminal device according to a first sending power, where the first sending power may be a power determined by the first terminal device according to power configuration information corresponding to the SL PRS.

By adopting the method, the power of the SL PRS can be flexibly determined by the first terminal equipment according to the power configuration information, so that the excessive or insufficient power of the SL PRS can be avoided, and the reliability of the SL PRS transmission is improved.

In some embodiments of the present disclosure, the second terminal device may further receive power configuration information transmitted by the first terminal device.

In some embodiments, the second terminal device may receive a third message sent by the first terminal device, where the third message may include the power configuration information.

In one implementation, the third message may include at least one of a Sidelink RRC message, a Sidelink MAC CE, a Sidelink DCI, or other messages corresponding to a direct link.

In another implementation, the third message may be a direct link system broadcast message, a direct link RRC reconfiguration message, a direct link LTE positioning protocol message, or a direct link RRC message specific to the first terminal device.

In some embodiments, the second terminal device determines the path loss from the power configuration information.

In other embodiments, the second terminal device receives the SL PRS according to the power configuration information.

In this way, the second terminal device can determine the path loss or receive the SL PRS according to the received power configuration information, and the reliability of the SL PRS transmission can be improved.

Fig. 6 is a flowchart illustrating a method of transmitting a positioning reference signal according to an exemplary embodiment. The method can be applied to the network equipment in the communication system. As shown in fig. 6, the method may include:

s601, the network equipment sends direct link configuration information to the first terminal equipment.

The direct link configuration information is used for indicating the first terminal equipment to determine power configuration information corresponding to the direct link positioning reference signal SL PRS.

In some embodiments, the network device may send the direct link configuration information to the first terminal device via a broadcast message.

In other embodiments, the network device may send the direct link configuration information to the first terminal device via the first message.

The first message may be a dedicated message corresponding to the first terminal device. For example, the first message may include at least one of an RRC message, a MAC CE, a DCI, or other message sent by the network device to the first terminal device.

In some embodiments, the power configuration information may be included in the direct link configuration information.

In some embodiments, the power configuration information may include at least a second transmit power corresponding to the SL PRS. The first terminal device may determine, according to the second transmission power, a first transmission power corresponding to the SL PRS, for example, using the second transmission power as the first transmission power corresponding to the SL PRS.

In other embodiments, the power configuration information may include at least one of a path loss compensation factor (alpha), a target received power (P0), and a path loss reference signal.

A direct link synchronization signal SL SSB;

direct link channel state information SL CSI-RS;

a direct link positioning reference signal SL PRS;

physical direct link shared channel SL PSSCH;

physical direct link control channel SL PSCCH.

By adopting the method, the network equipment sends the direct link configuration information to the first terminal equipment, and the direct link configuration information can be used for indicating the first terminal equipment to determine the power configuration information corresponding to the direct link positioning reference signal SL PRS. In this way, a first transmit power of the SL PRS may be determined.

Fig. 7 is a flowchart illustrating a method of transmitting a positioning reference signal according to an exemplary embodiment. As shown in fig. 7, the method may include:

s701, the network equipment sends direct link configuration information to the first terminal equipment.

S702, the first terminal equipment determines power configuration information corresponding to the SL PRS according to the direct link configuration information, and determines first transmission power corresponding to the SL PRS according to the power configuration information.

S703, the first terminal equipment sends SL PRS to the second terminal equipment according to the first sending power.

It should be noted that, under the condition of no contradiction, the present embodiment may be combined with the foregoing embodiment or implementation manner of the present disclosure and various alternatives thereof, and the specific implementation manner of the foregoing steps in the present embodiment may also refer to the description in the foregoing embodiment of the present disclosure, which is not repeated herein.

By adopting the method, the network equipment sends the direct link configuration information to the first terminal equipment, the first terminal equipment determines the power configuration information corresponding to the SL PRS according to the direct link configuration information, and determines the first sending power corresponding to the SL PRS according to the power configuration information. In this way, the first transmission power of the SL PRS can be flexibly controlled, and the transmission reliability of the SL PRS can be improved.

In an exemplary embodiment, the present disclosure further provides a communication system, which may include a first terminal device and a network device, wherein the first terminal device may perform the method for transmitting a positioning reference signal related to the terminal device in the foregoing embodiments of the present disclosure; the network device may perform the method of transmitting the positioning reference signal related to the network device in the above embodiments.

In some embodiments of the present disclosure, the first terminal device may obtain power configuration information (may also be referred to as power parameter configuration information) of the SL PRS, and determine a first transmit power of the SL PRS based on the power configuration information.

In some embodiments of the present disclosure, the power configuration information of the SL PRS may be derived from direct link SL pre-configuration information of the first terminal device, or from direct link SL configuration information broadcast by the network device, or from SL PRS power configuration information configured by the network device through an RRC dedicated message, or a configuration agreed for a system or a protocol.

In some embodiments, if the SL-PRS resources are Configured with a Grant (CG) resource allocation, the power configuration information of the SL PRS may be Configured separately per CG (per Configured Grant), or separately per CG per SL PRS resource group (per Configured Grant per SL-PRS resource set), or separately per CG per SL PRS resource (per Configured Grant per SL-PRS resource), or all SL-PRS Configured Grant are Configured with the same power parameters, or separately per terminal device (per UE).

In some embodiments, the network device may indicate the above power configuration information through Configured Grant configuration information of the RRC dedicated message.

In some embodiments, if power configuration information Configured separately per CG per SL PRS resource group is adopted, one configuration Grant Configured Grant may include one or more SL-PRS resource groups and power configuration information corresponding to each SL PRS resource group.

In some embodiments, if power configuration information Configured separately per CG per SL PRS resource is adopted, one configuration Grant Configured Grant may include one or more SL-PRS resources and power configuration information corresponding to each SL PRS resource.

In some embodiments, if power configuration information Configured separately per terminal device is employed, the power configuration information may be applicable to dynamically scheduled SL-PRSs, as well as Configured Grant scheduled SL-PRSs.

In some embodiments, if the SL-PRS resource adopts an autonomous resource allocation mode, the power configuration information may be derived from SL configuration parameters broadcasted by the network device, or SL parameters preconfigured by the first terminal device, or a system contract or a protocol contract.

In some embodiments, if the first terminal device may receive a message from the network device (e.g., UE in coverage), the power configuration information may be determined using SL configuration parameters broadcast by the network device; if the first terminal device cannot receive the message from the network device (e.g., UE out of coverage), the pre-configured SL configuration parameters may be used.

In some embodiments, if the SL PRS resources are dynamically scheduled and/or Configured Grant resource allocation, and the power configuration information is Configured for each terminal device separately, the terminal device may be notified through RRC or MAC CE.

In some embodiments, if the SL-PRS adopts a dynamic scheduling manner, the power configuration information may be configured separately for each dynamic scheduling, for example, the power configuration information may be included in PDCCH DCI for each dynamic scheduling.

In some embodiments, if the SL-PRS employs the resource scheduling of Configured Grant type, the power configuration information may be Configured per CG, e.g., the power configuration information may be contained in each Configured Grant activation DCI (activation DCI).

In some embodiments of the present disclosure, the power configuration information includes SL PRS resource power.

In some embodiments, the SL PRS resource power is an average EPRE of resource elements carrying SL-PRS.

In some embodiments, the first terminal device may transmit the SL-PRS based on the SL PRS resource power for one or more of:

if the SL PRS is sent in a broadcast or multicast mode;

if the first terminal equipment only has the power parameter configuration;

if the first terminal equipment adopts an autonomous resource allocation mode;

if the first terminal equipment cannot acquire the path loss of the SL link with the SL-PRS receiver: for example, the SL-SSB, or PSCCH, or PSSCH, or CSI-RS, or SL-PRS, transmitted by the SL-PRS receiver cannot be received. The SL-PRS receiver may be a second terminal device that receives the SL PRS;

if the first terminal equipment does not establish SL connection with the SL-PRS receiver;

if the SL-PRS receiver is not configured with measurement reporting to the first terminal device, such as a CSI-RS report.

In other embodiments of the present disclosure, the power configuration information may include at least one of the following information:

and the value range of the path loss compensation factor (alpha) can be 0-1.

Target received power (P0);

and (5) path loss reference signals.

In some embodiments, the first transmit power=p0+alpha for SL-PRS is the path loss+other power compensation factors.

In some embodiments, the first terminal device may transmit the SL-PRS based on the power configuration information for one or more of:

if the SL PRS is sent in a unicast or multicast mode;

if the first terminal equipment has SL-PRS resource power configuration and the power parameter configuration at the same time, preferentially using the power parameter configuration;

if the first terminal equipment only has the power parameter configuration, the UE uses the power parameter configuration;

if the first terminal equipment can acquire the path loss of the SL link with the SL-PRS receiver, the UE uses the power parameter configuration. For example, a SL-SSB, or PSCCH, or PSSCH, or CSI-RS, or SL-PRS may be received for transmission by a SL-PRS receiver. Likewise, the SL-PRS receiver may be a second terminal device that receives the SL PRS;

if the first terminal equipment and the SL-PRS receiver establish SL connection, the UE uses the power parameter configuration;

If the SL-PRS receiver is configured with measurements to report to the UE, such as a CSI-RS report.

In some embodiments, the path loss reference signal includes at least one of:

a direct link synchronization signal SL SSB;

direct link channel state information SL CSI-RS;

a direct link positioning reference signal SL PRS;

physical direct link shared channel SL PSSCH;

physical direct link control channel SL PSCCH.

In some embodiments, the path loss reference signal is sent to the second terminal device for the first terminal device or sent to the first terminal device by the second terminal device. The second terminal device is a receiver of the SL-PRS sent by the first terminal device. If the path loss reference signal is sent to the second terminal equipment by the first terminal equipment, the second terminal equipment reports the measurement result of the reference signal to the first terminal equipment, and the first terminal equipment calculates the path loss, or the second terminal equipment directly reports the path loss to the first terminal equipment.

In some embodiments, if the path loss reference signal includes a SL PSSCH/PSCCH, the path loss reference signal may be based on DMRS on the SL PSSCH/PSCCH.

In some embodiments, if the path loss reference signal may be in a system-agreed or protocol-agreed manner, no configuration is required.

In some embodiments, if the path loss reference signal includes SL SSB or SL CSI-RS, then SL SSB index, or SL CSI-RS index may be indicated.

In some embodiments of the present disclosure, the first terminal device may send power configuration information corresponding to the SL PRS to the second terminal device. Wherein the first terminal device is a sender of the SL PRS and the second terminal device is a receiver of the SL PRS.

The third message may be a direct link system broadcast message, a direct link RRC reconfiguration message, an SLPP message, or a direct link RRC message specific to the first terminal device.

Fig. 8 is a block diagram illustrating an apparatus 2100 for transmitting positioning reference signals in accordance with an illustrative embodiment. The apparatus may be applied to a first terminal device. As shown in fig. 8, the apparatus 2100 may include:

a first processing module 2101 configured to determine a first transmission power corresponding to a direct link positioning reference signal SL PRS according to power configuration information corresponding to the SL PRS;

a first transmitting module 2102 configured to transmit the SL PRS to a second terminal device according to the first transmit power.

In some embodiments, the power configuration information includes a second transmit power; the first processing module 2101 is configured to take the second transmission power as the first transmission power if the first terminal device satisfies a first condition; wherein the first condition includes at least one of:

the transmission mode of the SL PRS is a broadcast or multicast mode;

the first terminal device comprises a power configuration message;

In some embodiments, the power configuration information includes at least one of a path loss compensation factor, a target received power, and a path loss reference signal; the first processing module 2101 is configured to determine the first transmission power according to the power configuration information if the first terminal device satisfies a second condition; wherein the second condition includes at least one of:

The transmission mode of the SL PRS is a unicast mode or a multicast mode;

the first terminal device comprises a power configuration message;

In some embodiments, the first processing module 2101 is configured to derive a path loss from the path loss reference signal measurement; and calculating the first transmitting power according to the path loss compensation factor, the target receiving power and the path loss.

In some embodiments, the path loss reference signal includes at least one of:

a direct link synchronization signal SL SSB;

direct link channel state information SL CSI-RS;

a direct link positioning reference signal SL PRS;

physical direct link shared channel SL PSSCH;

physical direct link control channel SL PSCCH.

In some embodiments, the first processing module 2101 is further configured to determine the power configuration information according to pre-configured direct link pre-configuration information; or receiving the direct link configuration information sent by the network equipment, and determining the power configuration information according to the direct link configuration information.

In some embodiments, the first processing module 2101 is configured to receive a broadcast message sent by a network device; the broadcast message includes the direct link configuration information; or receiving a first message sent by the network equipment to the first terminal equipment; the first message includes the direct link configuration information.

In some embodiments, the first processing module 2101 is further configured to determine a resource allocation pattern corresponding to the SL PRS; and determining the power configuration information corresponding to the SL PRS according to the resource allocation mode.

In some embodiments, the first processing module 2101 is configured to determine, if the direct link configuration information sent by the network device is received in the case that the resource allocation mode is the second resource allocation mode, the power configuration information according to the direct link configuration information; or if the resource allocation mode is the second resource allocation mode, if the direct link configuration information sent by the network equipment is not received, determining the power configuration information according to the pre-configured direct link pre-configuration information.

In some embodiments, in a case that the resource allocation mode is a first resource allocation mode, the wireless resource for transmitting the SL PRS is allocated by the network device in a manner of dynamic scheduling or configuring an authorized CG; the first processing module 2101 is configured to:

In some embodiments, the first processing module 2101 is configured to:

In some embodiments, the first sending module 2102 is further configured to send the power configuration information to the second terminal device.

Fig. 9 is a block diagram illustrating an apparatus 2200 for transmitting positioning reference signals, according to an example embodiment. The apparatus may be applied to a network device. As shown in fig. 10, the apparatus 2200 may include:

a second transmitting module 2201 configured to transmit the direct link configuration information to the first terminal device; the direct link configuration information is used for indicating the first terminal equipment to determine power configuration information corresponding to a direct link positioning reference signal SL PRS.

In some embodiments, the second transmitting module 2201 is configured to:

In some embodiments, the power configuration information includes a second transmit power corresponding to the SL PRS.

a path loss compensation factor;

target received power;

and (5) path loss reference signals.

In some embodiments, the path loss reference signal includes at least one of:

a direct link synchronization signal SL SSB;

direct link channel state information SL CSI-RS;

a direct link positioning reference signal SL PRS;

physical direct link shared channel SL PSSCH;

physical direct link control channel SL PSCCH.

The specific manner in which the various modules perform the operations in the apparatus of the above embodiments have been described in detail in connection with the embodiments of the method, and will not be described in detail herein.

Fig. 10 is a block diagram illustrating an apparatus for transmitting a positioning reference signal according to an exemplary embodiment. The means 3000 for transmitting the positioning reference signal may be a terminal device (for example, a first terminal device or a second terminal device) in the communication system shown in fig. 1, or may be a network device in the communication system.

Referring to fig. 10, the apparatus 3000 may include one or more of the following components: a processing component 3002, a memory 3004, and a communication component 3006.

The processing component 3002 may be used to control overall operations of the apparatus 3000, such as operations associated with display, telephone calls, data communications, camera operations, and recording operations. The processing assembly 3002 may include one or more processors 3020 to execute instructions to perform all or part of the steps of the method of transmitting positioning reference signals described above. Further, the processing component 3002 may include one or more modules to facilitate interactions between the processing component 3002 and other components. For example, the processing component 3002 may include a multimedia module to facilitate interaction between the multimedia component and the processing component 3002.

The memory 3004 is configured to store various types of data to support operations at the apparatus 3000. Examples of such data include instructions for any application or method operating on device 3000, contact data, phonebook data, messages, pictures, videos, and the like. The memory 3004 may be implemented by any type or combination of volatile or non-volatile memory devices, such as Static Random Access Memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic or optical disk.

The communication component 3006 is configured to facilitate communication between the apparatus 3000 and other devices in a wired or wireless manner. The device 3000 may access a wireless network based on a communication standard, such as Wi-Fi,2G, 3G, 4G, 5G, 6G, NB-IOT, eMTC, etc., or a combination thereof. In one exemplary embodiment, the communication component 3006 receives broadcast signals or broadcast related information from an external broadcast management system via a broadcast channel. In an exemplary embodiment, the communication component 3006 further includes a Near Field Communication (NFC) module to facilitate short range communications. For example, the NFC module may be implemented based on Radio Frequency Identification (RFID) technology, infrared data association (IrDA) technology, ultra Wideband (UWB) technology, bluetooth (BT) technology, and other technologies.

In an exemplary embodiment, the apparatus 3000 may be implemented by one or more Application Specific Integrated Circuits (ASICs), digital Signal Processors (DSPs), digital Signal Processing Devices (DSPDs), programmable Logic Devices (PLDs), field Programmable Gate Arrays (FPGAs), controllers, microcontrollers, microprocessors, or other electronic elements for performing the above-described methods of transmitting positioning reference signals.

The apparatus 3000 may be a stand-alone electronic device or may be part of a stand-alone electronic device, for example, in one embodiment, the electronic device may be an integrated circuit (Integrated Circuit, IC) or a chip, where the integrated circuit may be an IC or may be a set of multiple ICs; the chip may include, but is not limited to, the following: GPU (Graphics Processing Unit, graphics processor), CPU (Central Processing Unit ), FPGA (Field Programmable Gate Array, programmable logic array), DSP (Digital Signal Processor ), ASIC (Application Specific Integrated Circuit, application specific integrated circuit), SOC (System on Chip, SOC, system on Chip or System on Chip), etc. The integrated circuit or chip may be configured to execute executable instructions (or code) to implement the method of transmitting a positioning reference signal. The executable instructions may be stored on the integrated circuit or chip or may be retrieved from another device or apparatus, such as the integrated circuit or chip including a processor, memory, and interface for communicating with other devices. The executable instructions may be stored in the processor, which when executed by the processor implements the above-described method of transmitting positioning reference signals; alternatively, the integrated circuit or chip may receive executable instructions through the interface and transmit the executable instructions to the processor for execution to implement the above-described method of transmitting positioning reference signals.

In an exemplary embodiment, the present disclosure also provides a computer-readable storage medium having stored thereon computer program instructions which, when executed by a processor, implement the steps of the method of transmitting a positioning reference signal provided by the present disclosure. The computer readable storage medium may be, for example, a non-transitory computer readable storage medium including instructions, for example, the memory 3004 including instructions executable by the processor 3020 of the apparatus 3000 to perform the method of transmitting positioning reference signals. For example, the non-transitory computer readable storage medium may be ROM, random Access Memory (RAM), CD-ROM, magnetic tape, floppy disk, optical data storage device, etc.

In another exemplary embodiment, a computer program product is also provided, comprising a computer program executable by a programmable apparatus, the computer program having code portions for performing the above-described method of transmitting a positioning reference signal when executed by the programmable apparatus.

Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure. This application is intended to cover any adaptations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.

It is to be understood that the present disclosure is not limited to the precise arrangements and instrumentalities shown in the drawings, and that various modifications and changes may be effected without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A method of transmitting a positioning reference signal, performed by a first terminal device, the method comprising:

2. The method of claim 1, wherein the power configuration information comprises a second transmit power; the determining, according to the power configuration information corresponding to the direct link positioning reference signal SL PRS, the first transmission power corresponding to the SL PRS includes:

the transmission mode of the SL PRS is a broadcast or multicast mode;

the first terminal device comprises a power configuration message;

3. The method of claim 2, wherein the second transmit power is an average resource power corresponding to a radio resource used to transmit the SL PRS.

4. A method according to claim 3, characterized in that the radio resource comprises resource elements RE, the average resource power being per RE energy EPRE.

5. The method of claim 1, wherein the power configuration information comprises at least one of a path loss compensation factor, a target received power, and a path loss reference signal; the determining, according to the power configuration information corresponding to the direct link positioning reference signal SL PRS, the first transmission power corresponding to the SL PRS includes:

the transmission mode of the SL PRS is a unicast mode or a multicast mode;

The first terminal device comprises a power configuration message;

6. The method of claim 5, wherein said determining said first transmit power based on said power configuration information comprises:

obtaining path loss according to the path loss reference signal measurement;

7. The method according to claim 5 or 6, wherein the path loss reference signal comprises at least one of:

a direct link synchronization signal SL SSB;

direct link channel state information SL CSI-RS;

a direct link positioning reference signal SL PRS;

physical direct link shared channel SL PSSCH;

physical direct link control channel SL PSCCH.

8. The method according to any of claims 1 to 7, wherein the power configuration information is determined by:

9. The method of claim 8, wherein receiving the direct link configuration information sent by the network device comprises:

10. The method according to any of claims 1 to 9, wherein the power configuration information is determined by:

determining a resource allocation mode corresponding to the SL PRS;

11. The method according to claim 10, wherein the resource allocation pattern is a first resource allocation pattern or a second resource allocation pattern; the first resource allocation mode is a resource allocation mode for selecting resources based on network equipment, and the second resource allocation mode is a resource allocation mode for selecting resources based on terminal equipment.

12. The method of claim 11, wherein the determining the power configuration information corresponding to the SL PRS according to the resource allocation pattern comprises:

13. The method of claim 11, wherein, in the case where the resource allocation pattern is the first resource allocation pattern, the wireless resources for transmitting the SL PRS are allocated by the network device in a manner of dynamic scheduling or configuration grant CG; the determining the power configuration information corresponding to the SL PRS according to the resource allocation pattern includes:

14. The method of claim 13, wherein the obtaining the power configuration information from the configuration indication comprises:

15. The method according to any one of claims 1 to 14, further comprising:

16. A method of transmitting a positioning reference signal, performed by a network device, the method comprising:

17. The method of claim 16, wherein the sending the direct link configuration information to the first terminal device comprises:

18. The method of claim 16, wherein the power configuration information comprises a second transmit power corresponding to the SL PRS.

19. The method of claim 16, wherein the power configuration information comprises at least one of:

a path loss compensation factor;

target received power;

and (5) path loss reference signals.

20. The method of claim 19, wherein the path loss reference signal comprises at least one of:

a direct link synchronization signal SL SSB;

direct link channel state information SL CSI-RS;

A direct link positioning reference signal SL PRS;

physical direct link shared channel SL PSSCH;

physical direct link control channel SL PSCCH.

21. An apparatus for transmitting a positioning reference signal, applied to a first terminal device, the apparatus comprising:

22. An apparatus for transmitting a positioning reference signal, for use with a network device, the apparatus comprising:

23. An apparatus for transmitting a positioning reference signal, the apparatus comprising:

a processor;

a memory for storing processor-executable instructions;

wherein the processor is configured to perform the steps of the method of any one of claims 1 to 15 or the processor is configured to perform the steps of the method of any one of claims 16 to 20.

24. A computer readable storage medium having stored thereon computer program instructions, which when executed by a processor, perform the steps of the method of any of claims 1 to 15 or which when executed by a processor, perform the steps of the method of any of claims 16 to 20.

25. A communication system, comprising:

a first terminal device performing the method of any of claims 1 to 15;

a network device performing the method of any of claims 16 to 20.